EOLine
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The first and most important step of the ZZ Method. It involves orienting all 12 edges (see Edge Orientation for an explanation), while simultaneously placing the line edges (DF and DB). After the EO part, the cube is reduced to <R, U, L, D, F2, B2>. After placing DB and DF, the cube is reduced to <R, U, L>, meaning it can be solved completely by turning only the R, U and L layers.
This concept has been developed further and lead to lots of other EO Steps.
Solving the line after EO
Place DF and DB in their solved positions using <R, U, L, D, F2, B2>.
EO+Line
In order to improve ease of learning and simplify the planning step, beginners may treat EOLine as two steps - EO+Line. Using this approach only EO is planned during inspection. The solver looks-ahead for the line edges during EO execution to plan for placement of the line. Although sometimes a useful fallback for difficult EOLine cases, EO+Line causes the solver to focus on the line edges during the inital steps, rather than looking ahead for the first 1x2x2 block. This significantly reduces the likelyhood of a smooth transition from EOLine to F2L.
External links
- EOLine Tutorial (text based)
- EOLine Tutorial (youtube)
